[Decode_Base64URL]

Description

Decoding tag implementing Base64URL, as per http://www.ietf.org/rfc/rfc4648.txt (the corresponding 'decode' tag for Encode_Base64URL). (Essentially the same as the Base64 encoding scheme but the '=' padding character is omitted and the '+' & '/' characters are exchanged for the URL-safe '-' & '_'.)

Sample Usage

Decode_Base64URL('SW9h_SZVfV0x1T9BSuLPEBdvlZWXZOe9b1LeTYp-9A');

Source Code

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define_tag( 'Base64URL', -namespace='decode_', -required='in' );
	local( 'out' = string(#in)->replace('-','+')&->replace('_','/')& );
	if( (#out->size % 4) );
		#out += ('=' * (4-(#out->size % 4))) ;
	/if;
	return( decode_base64(#out) );
/define_tag;

Related Tags

• Encode_Base64URL

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